Error at Motorola v3x

Question

HELP!!!
I installed a J2ME application on my Motorola v3x.
when i run the application i get the following error:
"Cannot create player"
The code seems to be OK, I checked it on some Sony Ericsson emulators. I didn't find a suitable emulators for my motorola device.
Here is the code:
package videoPlayer;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/** A simple video player MIDlet using JSR 135 - Mobile Media API */
public class VideoPlayer extends MIDlet implements CommandListener
     private Command exitCommand;
     private Command playCommand;
     private Command contentTypeCommand;
     private Display display;
     private TextField textField;
     public Form form;
     private Gauge gauge;
     private static final int GAUGE_LEVELS = 4;
     private static final int GAUGE_MAX = 12;
     private static final String DEFAULT_URL = "http://localhost/test.mpg";
     public VideoPlayer() {
          display = Display.getDisplay(this);                    
          form = new Form("Video Player");
          textField = new TextField("Video URL", DEFAULT_URL, 100, TextField.ANY);
          gauge = new Gauge("Acquiring video", false, GAUGE_MAX, 0);          
          exitCommand = new Command("Exit", Command.EXIT, 2);     
          playCommand = new Command("Play", Command.SCREEN, 1);
          contentTypeCommand = new Command("Supported media types", Command.SCREEN, 2);
          form.addCommand(playCommand);
          form.addCommand(exitCommand);
          form.addCommand(contentTypeCommand);
          form.setCommandListener(this);
          form.append(textField);          
     public void startApp(){                    
          display.setCurrent(form);                    
     public void pauseApp(){     
     public void destroyApp(boolean unconditional){     
     public void commandAction(Command c, Displayable s){          
          if(c == exitCommand){
               destroyApp(false);
               notifyDestroyed();     
          else if(c == playCommand){                              
               gauge.setValue(0);
               form.append(gauge);               
               VideoCanvas videoCanvas = new VideoCanvas(this);
               videoCanvas.initializeVideo(textField.getString());                                   
          else if (c == contentTypeCommand){
               String url = textField.getString();
               int position = url.indexOf(':');
               String protocol = url.substring(0, position);
               SupportedTypes typesUI = new SupportedTypes(this, protocol);     
               display.setCurrent(typesUI);     
     public void updateGauge(){
          int current = gauge.getValue();          
          current = (current + GAUGE_MAX/GAUGE_LEVELS);
gauge.setValue(current);          
package videoPlayer;
import javax.microedition.lcdui.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import java.io.*;
/** Acquires the video content and renders it */
public class VideoCanvas extends Canvas implements CommandListener, PlayerListener, Runnable {
     private VideoPlayer parent;
     private Display display;
     private Player player;
     private VideoControl videoControl;
     private String url;
     private Thread initializer;
     private Command close;
     private Command rePlay;
     public VideoCanvas(VideoPlayer parent){
          super();
          this.parent = parent;
          display = Display.getDisplay(parent);
          close = new Command("close", Command.SCREEN, 1);
          addCommand(close);
          setCommandListener(this);               
     public void initializeVideo(String url){     
          this.url = url;
          initializer = new Thread(this);     
          initializer.start();
     public void run(){
          try {                                   
               player = Manager.createPlayer(url);
               parent.updateGauge();                              
               player.addPlayerListener(this);                
               player.realize();
               parent.updateGauge();                                        
               player.prefetch();
               parent.updateGauge();                              
} catch (IOException ioe) {
               Alert alert = new Alert("IOException thrown", ioe.getMessage(), null, AlertType.ERROR);
               display.setCurrent(alert);
} catch (MediaException me) {
               Alert alert = new Alert("MediaException thrown", me.getMessage(), null, AlertType.ERROR);
               display.setCurrent(alert);
          playVideo();
     public void playVideo(){
          try {
// Get the video control and set it to the current display.
videoControl = (VideoControl)player.getControl("VideoControl");
if (videoControl != null) {                    
                    videoControl.initDisplayMode(videoControl.USE_DIRECT_VIDEO, this);                                                  
               parent.updateGauge();
               int cHeight = this.getHeight();
               int cWidth = this.getWidth();               
               videoControl.setDisplaySize(cWidth, cHeight);      
               display.setCurrent(this);
               videoControl.setVisible(true);
player.start();
} catch (MediaException me) {
               Alert alert = new Alert("MediaException thrown", me.getMessage(), null, AlertType.ERROR);
               display.setCurrent(alert);
     /** Paints background color */
     public void paint(Graphics g){
          g.setColor(128, 128, 128);
          g.fillRect(0, 0, getWidth(), getHeight());          
     public void playerUpdate(Player p, String event, Object eventData) {
          //add "Replay" option when video is finished
          if (event == PlayerListener.END_OF_MEDIA)
               if (rePlay == null)
                    rePlay = new Command("re-play", Command.SCREEN, 1);     
                    addCommand(rePlay);
     public void commandAction(Command c, Displayable s) {          
          if(c == rePlay){          
               try{
                    player.start();     
               } catch (MediaException me) {
                    Alert alert = new Alert("MediaException thrown", me.getMessage(), null, AlertType.ERROR);
                    display.setCurrent(alert);
          else if(c == close){                                                            
               player.close();
               parent.form.delete(1);
               display.setCurrent(parent.form);
               url=null;
               parent=null;
}

Answer 1

I downloaded and installed the SDK of Motorola and when i run my application i get the error:
"createPlayer() filed"
I added to my code the following lines:
String[] types = Manager.getSupportedContentTypes(protocol);
          for(int i = 0; i < types.length; i++) {
               append(new TextField("http", types, 20, TextField.ANY));           
When i run the RAZR_v3x Emolator i get that the only video format which it supports is .mng, but i checked in Motorola web site about this device and i saw that it supports MPEG4, WMA, MP3 and Real Video/Audio files.
Do you something about that??
Thanks